co2_eval_moving {care4cmodel}

Fuel Consumption and CO2 Emissions for Moving Wood From the Felling Spot to the Forest Road

Description

Given the output of a simulation run (i.e. an object of class c4c_base_result) as created with the function simulate_single_concept, the fuel consumption and CO2 emissions for moving the wood to a truck road are calculated. Currently, this function assumes only forwarder operations.

Usage

co2_eval_moving(
  x,
  road_density,
  rel_loss = 0.1,
  mode = c("standard", "nordic")
)

Arguments

x

An object of class c4c_base_result

road_density

Forest road density (m/ha), relating to truck-accessible roads

rel_loss

Relative amount of the standing tree volume that is lost during harvesting (default 0.1). Note that the harvested amount is reduced with the factor 1 - rel_loss before upscaling from the fuel consumption per m³, because only the wood remaining after the harvest loss (mainly the stumps) is actually moved.

mode

Character string to choose between "standard" (default) and "nordic". With the option "standard", the function fuel_cons_forwarder_1 is used, while "nordic" makes use of fuel_cons_forwarder_2

Value

A data frame (tibble) with the columns time, harvest_type (damage or regular), phase_no, phase_name (numbers and names of the stand development phases), fuel_moving_l_per_m3 (liters of fuel consumed per m3 of moved wood), fuel_moving_total_l (liters of fuel consumed in total), co2_moving_total_kg (kg CO2 emitted).

Examples

  base_out <- simulate_single_concept(
   pine_thinning_from_above_1,
   init_areas = c(50, 100, 10, 50, 150, 600),
   time_span  = 50,
   risk_level = 3
  )

  co2_eval_moving(base_out, road_density = 35, mode = "standard")
  co2_eval_moving(base_out, road_density = 35, mode = "nordic")